The quantification of the extent of flooding on selected major Afrotropical lakes to guide management implications
The quantification of the extent of flooding on selected major Afrotropical lakes to guide management implications
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DOI：
10.3389/fenvs.2023.1062289
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发表时间：
2023-03
期刊：
影响因子：
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通讯作者：
C. Aura;C. Nyamweya;S. Musa;Z. Ogari;Winnie Owoko;M. Osore;L. May;J. Njiru
中科院分区：
文献类型：
--
作者：
C. Aura;C. Nyamweya;S. Musa;Z. Ogari;Winnie Owoko;M. Osore;L. May;J. Njiru
脆弱的内陆和湖泊系统的洪水泛滥程度可以显示这种现象的覆盖范围和严重程度，以便加强政策。这项研究审查了选定的非洲热带湖泊水位上升造成的洪水泛滥程度，以指导维持受影响社区生计的干预措施。最容易发生洪水的年份（2010年和2020年）被用作利用地理空间和遥感技术提取湖岸线空间范围和面积变化以及降雨量和卫星测高数据的基线。洪水泛滥的程度是强烈的，但不显着相关（R 2 = 0.63; p = 0.07）的研究湖泊的大小和降雨量。表面积最小的湖泊，如巴林戈和奈瓦沙，洪水增加幅度最大，分别为52.63%和42.62%。较大的湖泊如维多利亚湖（1.05%）、图尔卡纳湖（3.77%）和坦噶尼喀湖（0.07%）的面积增加幅度最小。此外，所研究的湖泊的地形进一步决定了洪水的停留时间和范围，例如爱德华（-0.09%）和鲁夸河（-3.25%）等湖泊在其他湖泊洪水泛滥期间消退。这里提供的信息和数据提供了最新的洪水量化，以支持内陆湖泊系统的适应战略，并指导政策的实施。
The extent of flooding in vulnerable inland and lacustrine systems can demonstrate the coverage and the magnitude of such phenomenon for policy enhancement. This study examined the extent of flooding due to rising water levels in selected Afrotropical lakes to guide interventions that would sustain the livelihoods of communities affected. The years that were most prone to flooding (2010 and 2020) were used as a baseline in the extraction of changes in spatial extent and area of lacustrine shoreline, and rainfall and satellite altimetry data, using geospatial and remote sensing technologies. The extent of flooding was strongly but insignificantly related (R 2 = 0.63; p = 0.07) to the sizes of the studied lakes and the amount of rainfall. Lakes with the smallest surface areas such as Baringo and Naivasha showed the greatest increase in flooding of 52.63% and 42.62%, respectively. Larger lakes such as Lakes Victoria (1.05%), Turkana (3.77%), and Tanganyika (0.07%) had the lowest increases in areal extent. Furthermore, the topography of the lakes studied further determined the residence time and the extent of flooding, such that lakes such as Edward (−0.09%) and Rukwa (−3.25%) receded during the period when other lakes were flooding. The information and data presented here provides the most up-to-date quantification of flooding to support adaptation strategies for inland lake systems and guide policy implementation.